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Siemens 3RV2021-4BA10 S0 Motor Protection Circuit Breaker

Siemens 3RV2121-4BA10 S0 Motor Protection Circuit Breaker with overload function.

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ManufacturerSiemens

Part number3RV2121-4BA10

Size S0

Class CLASS 10

A-release 13...20 A

N-release 260 A

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Motor protection Size S0 CLASS 10 Screw terminals Integrated overload relay function Standard switching capacity

Product description

The Siemens 3RV2121-4BA10 is a Size S0 circuit breaker designed for motor protection, incorporating an overload relay function. It has a CLASS 10 rating and features an adjustable A-release range of 13 to 20 A, with an N-release of 260 A. This breaker uses screw terminals for secure connections and offers standard switching capacity.

This component is ideal for direct-on-line motor starters and other applications where integrated overload protection is required. Its functionality is essential in industrial automation, manufacturing, and processing plants to prevent motor damage from overloads and short circuits.

Stanlo Automation, a veteran-owned surplus parts distributor, provides the Siemens 3RV2121-4BA10. Sourcing surplus from Stanlo ensures you receive a reliable, cost-effective solution for your industrial automation MRO needs, backed by our commitment to quality and service.

Technical specifications

Size	S0
Class	CLASS 10
A-release	13...20 A
N-release	260 A
Terminal Type	Screw terminal
Function	Overload relay function

Common applications

Motor starters

Industrial automation

Manufacturing

Process control

Machine building

Electrical panels

Compatible systems

Motor control circuits Direct-on-line starters Industrial automation Control panels

Also known as

3RV21214BA10 Siemens S0 overload breaker 3RV2 series breaker with relay

Replaces / compatible with

This Siemens 3RV2121-4BA10 circuit breaker is designed to replace similar Siemens S0 size motor protection breakers with integrated overload relay functionality.

Technical note

Expert tip

The overload relay function allows this single device to provide both short-circuit and thermal overload protection for motors, simplifying starter configurations.

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Frequently asked questions

Does the Siemens 3RV2121-4BA10 include overload protection?

Yes, the Siemens 3RV2121-4BA10 is specifically designed with an integrated overload relay function. It features an adjustable A-release setting between 13A and 20A to protect motors from sustained overcurrents.